Gelatin-sheet copying machine



April 29, 1930. w. E. WILLIAMS GELATIN SHEET COPYING MACHINE lll lll m, n@ Nw h mn, E nm f s Y M s /s @mw s mmm m SWW www NE @QN h QS! @w13 SN n@ mmh@ Q Q www NNN @www QS www @www w Nm ,w mm E m QS u ,Y N2 N3 V April 29, 1930. w. E. WILLIAMS 1,756,578

GELATIN SHEET COPYING MACHINE Filed July 25, 1928 ves sheets-sheet 2 www www S h n Nw April 29, 1930. w. E. wlLLlAMs GELATIN SHEET COPYING MACHINE Filed July 23, 1928 6 Sheets-Sheet I5 mm y QQ,

April 29,

w. E. WILLIAMS GELATIN SHEET COPYING MACHINE 6 Sheets-Sheet 4 Filed July 25, 1928 April 29, 1930. w. E. WILLIAMS '1,755,578

GELATIN SHEET COPYING MACHINE l Filed July 23. 1928 6 Sheets-Sheet 5 Y E35@ @www www L JVM rlhL A @S @TSX A@ KN manlvimmfu.

l 'la I.H.| lxx l m-- :.T @N i Q @VJWM T- April 29, 1930. W. E. WILLIAMS 1,756,578

I GELATN SHEET COPYING MACHINE I Filed July 25, 1928 6 Shees-Sheel 5 llll Hll Il Il llll Il IHIHIHIII Illu a herein.

Patented Api. 29, 1230 WILLIAM/I ERASTUS VLLIAMS, OF XVILMETTE, ILLINOIS, ASSGNOR TO DITTO., 'INCOR- PORATED, OF CHICAGO, ILLNOS, A CORPORATION OF WEST VRGNl-i GELATIN-SHEET CPYING MACHNE Application filed July 23,

5 chine and trained over a bed and wound upon another spindle at the other end of the ma chine and an impression carriage is mounted to travel backward and forward over the impression bed and carry a platen roll adapted li) to impress paper onto a gelatin sheet and thereby malte copies in the hectograph way.

The object of the invention is to make a machine with an improved type of impression carriage wherein the platen vroll is re- 15 volved positively all the time in the travel of the carriage over the bed and another object of the invention is to so mount the carriage that it will travel easily backward `and forward in impressing the paper on the hed and will be held squarely in all positions of its travel. Another object of the invention is to provide means for so placing the impression carriage that free access may be (1 had to the gelatin sheet in introducing a new D sheet or in cleaning and preparing the gelatin for service.

Another object of the invention is to provide winding mechanism that will permit the gelatin sheet to be wound with facility'in eitherv direction from either spindle at either end of the machine as desired.

Other objects of the invention are shownin detail of construction that will be set forth Reference will ing drawings in which Fig. l is a side ele-vation of the machine being what is termed the left side of the machine since the operator is positioned at the right end of the machine as shown in Fig. l. Y

Fig. 2 is a vertical sectional elevation of the machine looking in the saine direction of Fig. l but on line 2 2 of Fig. 4. Fig. 3 is a transverse det-ail of a stop block adapted and used to limit the outward travel C' site side from which the views Figs. l and 2 be had to the accompany-- 1928. Serial N0. MOtV are taken and shows a section of the carriage and a portion of the front of the machine.

Fig. 6 is a detail showing the trunnion bearings for the trunnions of the rocker shaft which carries the platen roll. y

Fig. 7 is a View looking from the same direction and the parts in substantially-the same position as that of Fig. 5 but showing the outside or right side of the impression carriage.

Fig. 8 is a similar view to that of Fig. 5 1

but with the impression carriage moved down to the position where a new` gelatin sheet roll is to be applied onto the machine.

This view is looking on the opposite side n from what is shown in Figs. l and 2.

Fig. 9 is a plan detail vof the right end of the platen roll shaft vand the rocker shaft which. carries the platen roll.

Fig. l0 is a vertical section on line 10-10 of 9 but there is added in Fig. l() a support bearing for the rocker shaft which sup ports the platen roll. 1

Fig. l1 is a front elevation of the machine being the end nearest to the operator being the right end of the Figs.r land 2 but in Fig.

ll a part of the impression carriage Vis omitted. .y

Fig. l2 is a transverse section through the frame of the machine on line 12-12 of Fig.' 4. .0

Fig. 13 is a. plan of the right or front end the frame of the machine illustrating the mechanism which controls the stops against which the carriage registers at the commencement of making copies.

Figa le on same sheet as that of Fig. 8 is a plan of the ratchet connection which holds vthe roel-:er shaft which carriesthe platen roll down in service position.

In the drawings l indicates the legs or feet which support the machine from a table or stand and 2 indicates the left side frame meinber and 3 theright side framemember of the body of the machine. These side frame members 2 and 3 are preferably Iliade outv of castings and they are tied across at their bases by the cross-beams or girders 4 secured by screws 5 and at the top of the machine there are the cross-beams' of angular form reinforced by the supplemental angular pieces 7 which supthe 'medium. of screws 11 screwed into an frame members.

angle bar 12 Which extends horizontally on vthe inside of the side ffame 2 and is secured thereto by screWs'or rivets through the medium of little angle blocks 13 fastened by screws 14 in the side frame members (see 12). Thus the side frame members are bound' across at the top by the cross-beams Sand 7 and the bed plate 8. On each side of the side frames on-the topouter edge there are railsV orfbars15 secured by screws 16 to the side At the front endof the ma- K' chine being the right of Figsl and 2 there are curved end segmentall plates 1'4" and the topedges of the bars 15 and the segmental plates 17 furnish the trackwvays upon which the impression carriage rides. The site frame members 2 and 3V are provided with rack teeth 18 shovvn in dotted lines in Fig.r 8 which are cut through atthe bases of the teeth leaving a clear passageway between each toothintothe offset spaces 19 (see or 12) thelrack teeth being integral with the portion20of the side frames. At the front end of the machine the rack teeth are eX- tended down over the curved ends of the side frames as indicated by Fig. 8. The open` for gudgeon shafts 24 and 25' see Figs.. 1 and Y TheseV gudgeon shafts engage the gudgeonlblocks 26'of the roll spindles 27 upon which the gelatin sheet 28 is Wound.' YArtthe right side of the machine the ends lofthe spindles27 are held by little trunnicns 29 (see Fig.

v12) which are on the ends of the gudgeons 2G ofthe'roll spindles 27 and these trunnion ends 29 are supported in bloc-ks 30 secured into a springfbar 31v at the front ofthe machine and a` spring bar 32 at the rear ofthemachine. These bars are fastened by screws 33 to the right frame piece 3 of the machine (see Fig. 2f). Beveled notches 34 shown in fullY lines in Fig 2 and indotted lines in Fig. 12 direct the-trunnions 29 to enter little holes adapted to carry the said trunnions and thus support theright ends of the spindles. The spring bars 31 and 32 allow the blocks 30 to be sprungtoward the right ofFig. l2 `and thus ivent revelutionin a baclmrarf release the gudgeon ends 26 from the gudgeon shafts 24 and 25'in taking out and putin a new spindle. The gudgeon shafts 24 and 25 are driven through the medium of a handwheel 35 (see Figs. 1 and 4) upon a shaft 36v which shaft Guts-idefof the sideframe 2 on the shaft 44v there. is a lever 455ha-ving1 aihandhold knob V46vvhich* permits' the operator; to rock the lever 48fro`m the position of Fig. 1 over to theright, ,thusswvinging the block 38-'oarryi ing the hand Wheel 35 With it over toward the right ofFig. 1. Uponfthe gudgeonshaft 24there-is a gearf47i andvon the shaft 38. there is ta gean48rand when the block 3.8is thrown far'ei-ioughlto the right of Fig.V 1 the-gear 48 meshes with: andV drives the gear V47 and the gudgeonshaft' 24 and thus Winds or unwinds the spindle'. carryingV the gelatin. sheet roll atthe fronta of the machine. A. gear 49 on a shaftOeis supported inthespace 21 anden this shaft O'fthereis a sprocket Wheel Which offsets 'from'thegear 49 and fastenedfthereto i Vandupon Whichthere 1s-;mounted a chain 51 andfwhenV the parts-are vinthe position show-n in Fig: 1i the gear 48.l is v'inengagement with the gear 49 andrtliusfa'revolution ofithe vhand vvheel'35` Willi drive ,the chain 5l; VBut on the; turning 'offthe 'bellcrank; lever 45 by4 the handle knob 46 over toward the right the gear48 isireleased from the geary 49 and thrownY intoengagement with they gear 47 onthe gudgeon shaft; 24.v The side. frame member 2'ris1zslotted to perinit'thebearingf'l to extend through the side frame 2V to permit this-movementof. the shaft'37 for enga-gement of. either'gear 47 or gear 49 as desired.

e On the gudgeon shaft 24 there iis/along sidc'tl'ie a ratchet and a pawl 53 hinged 54engaging the` ratchet' to prel direction the pawl {SS/havinga Weightedlend 55 which automatically holds the pawl 53 in place;V A t ro Aer shaft 58 hasmeunted upon it a l l. i ck 57 :naaste-d to li; .7 the Weighted end L 5 or the -pawl 53 and hold it out ofengo rement when is desired to unwind the dle under control of the gudgeon shaft The small hand'kneb 58 permits the oncrater to control the movement of the shaft 53 with block 57. At' the outer en d or the left: side of Fig. 1 the gudgeon shaft 25 has` mounted upon it a ratchet-59 .vhichis engaged by the pavvl@ ina similarl manner to. thatJ of the ratcnet 52 at the front of the machine but the pawl is disengaged from the ratchet by a pin in the end of a linl; 6l extending bach toward the front on the inside of the plate and hinged at 62 to a little lever likewise on the inside of plate 29 to a shaft 64 on lthe side of thc side framV member 2 and having fixed thereon a lever 65 which has a hand hold knob 66 by Which the operator may move the bar 61 to disengage the pa-vvl 60 but when the paivl is in engagement with the ratchet 59 the bar 61 is out of contact with the pavvl G0 to permit it to function normally as an automatic pawl to prevent the gudgeon shaft 25 from revolving ave only in one direction.

^ilrngside of the ratchet 59 there is a gear 67 which is in the position of Fig. 1 engaged byt ie gear 68 on a shaft 69 Which shaft 69 is carried by a block 70 hinged at 71 in the side frame member 2 the` liloclr 70 is connected at 72 to a link 78 which extends toward the ront of the machine and is connected at 74 to rocher shaft block 48, before mentioned, so that on a movement of the hand knob 46 the roel-:er shaft 'ilock 48 moves the block 7 0 carrying the shaft 69 with 'gear to a position out of engagement With lthe gear 67 on the gudgeon shaft 25 and thus disengage the driving of the gudgeon shaft from the hand Wheel 85 but the position of the parte shown in Fig. 1 the hand Wheel as connected up Will revolve the shaft 25 since e chain 51 passes over a sprocket 75 on the shaft 69 and drives gear 68.

Thus when the gudgeon shaft 24 is revolved by the hand Wheel 35 the gudg; on 25 is released from anyconnection to beV driven by the hand Wheel 85.A Thus by the one hand Wheel the gudgeon shaft 24 or the gudgeon shaft 25 may alternatelybe revolved to suit the operator Twhenever he sees fit to shift the position of the shaft 86 through the medium of the knob 46 and the gelatin sheet thus may he dreun and Wound to or from eithorspindle 27 at the front or the rear of the machine and orau'n over the. imp n bed 8 as desired.

he impression carriage is provided with a side plate 76 at the left side of the machine and a side plate 77 the right side which plates are connected across by girder plate 78 having a stiffening flange 79. The girder plate 7 8 also acting as a paper guide to direct the paper down to .the proper posi ion for registration on the impression bed. The side plates 76 and 77 are also connected across at the front of the carriage hy rod 80 passing through little brackets 81 on tlm sido plates of the carriage. The carriage is suoported on idle rollers 82 ou a shaft 83 ot i rear of the carriage and idle rollers 84 on a shaft 85 at the front of the machine (see Figs. 1` 5 and The shaft 88 is held in roller bearings 86 see 7) While the shaft 85 is held in roller bearing 87 (see Figs.

5 and 8) in peculiarly shaped blocks 88 Which are supported in dove-tailed grooves in the side plat-es 76 and 77 and the blocks 88 are integral with the curved and peculiarly shaped portion 90 which extends in the same vertical plane as the side plates of the carriage and entend back and connected at 9l to arms 92 fixed on a rocker shaft 93 mounted in'bearings in the side plates of the @arf riage. The rocher shaft 93 is provided with an arm 94 (see Figs. 2, 4 and 7 connected at 95 to a screw threaded rod 96 passing through the girder 78 of the carriage and is provided with athumb nut 97 for adjusting the movement of the rocker shaft 93 to move the blocks 88 which carry the shaft 85 and thus move horizontally the shaft 85 in relation to the body of the impression carriage., this movement being controlled by the thumb n t 97. A th mb not 98 locks the` thumb nut 97 from accidental movement.

The rollers 82' and 84 revolve idle on the siiafts 83 and 85 and ride on the rail bars 15. Mounted adjacent to the rollers 82 on the shaft 88 and lined to the said shaft are gearY Wheels 99 one each side frame of the carshaft- 85 and adjacent to the rollers 84 there are gear Wheels 100 fixed to the said shaft 85 arranged to travel positively by engagement- With'the rack teeth 18 in a similar manner tothe gears 99 notwithstanding the fact that the shaft 85 may be adjusted to or from the shaft 83 vby means of the rocher shaft 98 before mentioned.

Ait the outer right end of the s ft 85 (see Fig; there is mounted a fla ged pulley Wheel 101 which pulley Wheel revolves positively With the shaft 85 and it, in turn, under the control of the gear Wheels 100, so that as the carriage is moved outward and hackivard over the impression bed 8 the flanged pulley 101 revolves positively in either direction as the carriage moves.

At the rightside of the impressi'n carriage there extends out over the side plate 77 a bracket bar 102 which bar is fired to the side plate 77 by means of an angle bloclr 103 (see 11) at the top of the side plate77 and is connected at the lovver edge of the plate 77 by the screws 104. Stud shafts 105 and 106 (see 7 extend through the bracket 102 and into the side plate 77 and furnish bearings for the angzed idle pulleys 107 and 108. A belt 109 is trained over the pulley 101 and in between the idle pulleys 107and 108 and passes over a pulley 110 on the shaft 111 of a platen roll 112 the latter being the rubber faced roll which impresses the paper onto the portion of the gelatin sheet 118 that is on theeimpression bed 8. Thus as the carriage is moved backward andV forward over the bed "a positive revolution of the shaft drives .positively the rubber faced platen roll 112. The'sh'aft 111 of the said platen roll 112 at the right side ofthe carriage is supported at the right side of the machine by a peculiarover this trunnion centerV 116 ofshaft 115, so

that'regardless of Whatever position the platv:en roll may be in in relation to the impression bedSand'gelatin pad 113 thereon the platen iroll 112 itself Will not be moved by the beitv 109 in al revolving motion by the oscillation Vof the'rocker shaft 115 inv raising and lowering the platen roll ,112'to and from the gelatin, but theplatenroll -Will be positively moved by the beltV 109 as the carriage is moved backward `and forward over the bed of the machine.l Y Y The bracket 102 has an extension 117 (see Figs. 2, 6 10 `and 11) which extends on the V insideof the side plates of the carriage downvvvard to furnish the bearing for the right end I of Y the rocker shaft 115.

l This bearing is notched out on one side (see Figs. 6 and10) .ay-ndcovered by sliding block 118 secured by Y the screws intothe projection 117 and passino;

through slots in the block 118 thus the block 118 may beraised onithe .uncovering of one side of the hearing and permitting the removal A of theshaft 115. A bracket 119 at the leftside of the carriage is securedby the angle block 120 (see Fig. 11) tothe side plate 76 in the same manner as the bracket 102 is iixedto the side plate 77. This bracket 119 extends down in aprojection 121tov furnish the bearing for the left'end of the shaft 115 in the same manner as the projection 117 for the right end of the shaft 115 and a similar block to that of block 118 is also provided for this projection 121; thus the shaft 115 carrying the platen roll 112' may be taken out 'in toto byflifting the blocks 118 to free the trunnions 116 from supportingbearings in Y 1irojections 117 and 121.

The j ilaten'rollerv 112 may be released from the arm 114 (see Figs. 9 and 10) due to the fact that the hearingvfrom the shaft 111k of the roller in the arm 114 is openvat the bottoinandfthe shaft 111 isV held in place by latch hook 122 hinged at 123 and`lield by spring 124 to'hold the latchv in an engaging a positionto holdthe shaft 111 in place in the tioned block 135.

bearing in the arm 114. A projection 125 on the latch 122 permits the operatorto reiease the latch hook and permitthe shaft 111 of the platen roller 112 to drop out from engagement with the arm 114.

The other end or the left end of the platen roller 112 is held in an arm 126 on the shaft 115 (see'Figs. 4, 5, and 8). The arms 114 and 126 are mounted on shaft 115 by their hubs 127 forfthe arm 114 and 128 for the arm 126. These hubs are provided with upstanding projections 129 at the right of the machine and 130 at the left of the machine and these projections 129 and 130 are engaged by pins 131 and v132 (see Figs. 5y and 10) which pass through holes 133 in the projections 129 and 130 Which holes are slightly larger than the pins 131 and 132 and the pins 131 and 132 are secured in the blocks 134 and 135 the block 134 being a relatively short block Whiie block 135 extends higher than the block1134 and is providedvvith a ratchet block 136' (see Figs. 8 and 11) Whichvblock is secured by screws 137 to the aforemeir The arrangement- .of the pins 131 and 132 and the holes 133 is such that the arms 114 and 126 Which carry the impression or platen rubber faced roller 112 may have a slight rocking motion in relation to their fixture to the rocker shaft 115 to permit the platen roll 112 to adjust itself'on either end to fit any irregularity in the thickness of the gelatin sheet portion 113 on the impression bed 8 or any variation in the thickness of the paper copyto be applied thereon and this adjustment is made vby an elastic pressure through the medium of springs 138 (see Fig'. 10) coiled on the shaft 115 and secured into the hubs 127 and 128 of the arms 114 and 126 and-atthe other side of` these springs into collars 129 Which are provided With ratchetteeth 140 adapted to be adjusted and engage similar teeth on similar collars 141 fixed Yto shaft 115 Whereat the tightening action or loosening of the springs 138 may be brought about by the adjustment of the collars 139.

The springs 138 andthe Vcollars 139 and 141 normally are concealed by slipV covers in the form of a short piece of tubingvvhich slides over and covers up the said parts, this tubing heilig indicated by 142 in Fig. 4.

The ratchet block 136 is provided With ratchet teeth 143 (see Fig.-14) extending hori zontally tothe left of the machine and these teeth are engaged Whenever the platen roller is doWn in the service position by correspond-y ing Vteeth in a sliding block 144 mounted in dove-tailed groove in the bracket 119 `and provided With thumb knob 145 which knob has a projection Which extends down through a slot in the bracket 119 (see Fig. 11) Iwhich projection is connected to a spring 146 in a manner to push the block 144to the right in Fig. 11 and thus engagethe.ratchetfblock 186 and hold the same whenever the platen roll is in service position in laying on the paper on the gelatin sheet. At the outer end or let end of the block 144 and on the lower edge thereof there is a small roller 147 which is engaged by a beveled edge 148 of a lever 149 hinged at 150 (see Fig. 1) to the lett side plate 76 of the carriage and this lever 149 has a pin 151 which extends through a slot in the side plate 76 and is adapted to be engaged by a stop bar 152 when the carriage is home or at the right end of the machine when the pin 151 willhit'the bar 152 and thus move the lever 149 to cause its cam or beveled surface 148 to act on the roller 147 of the block 144 to release the ratchet block 136 to permit the rocker shaft 115 to be raised and thus raise the platen roll 112. The thumb knob 145 permits this release of the ratchet teeth whenever the operator so desires.

The rocker shaft 115 is actuated by an arm 158 upon which is mounted a handle hold bulb 154.

Hinged at 155 in the side trames 2 and 8 of the machine are arms 156 which are connected to and support a standard margin bar 157 (see Fig. 5) which margin bar has a shoulder 158 against which the paper is abutted and thus registered on its entrance to the machine for copying purposes, the paper being indicated by 159. llhenever a new spindle carrying the end oit a new gelatin pad sheet is desired to be entered into the machine, the margin bar 157 is revolved to the position of Fig. 8 and is held in repose in that position by a stop 160 butin the normal service of the machine the margin bar is in the position of Fig. 5. A clamping roll 161 (see Figs. 2, 4, 5, 7 and 8) adapted to clamp paper to the platen roll 112 is mounted in arms 162 hinged at 168 to bearing blocks 164 secured to the cross trame girders 78. The arms 162 are provided with extensions 165 in the end ot which there are set screws 166 which bear on the cross girder 78 and limit in one direction the movement of the arms 162.

Eye-bolts 167 are connected to the eXtensions 165 at 168 and project through the girder 78 and are provided with springs 169 and nuts 17 O by which the springs 169 may be adjusted to bring the compression roller in suitable Contact with the platen roll 112 in the act of laying down and taking up the paper-from the gelatin sheet.

i lateral or side paper guide (see Fig. for directing the paper to side registration is provided in the form of a plate 171 having the flange 172 and a turned over iiange 178 secured and adjusted. by a thumb nut bolt 17 4 adapted to slide along a slot 175 in the iiange 79 oi1 the cross girder 78. Thus the inside guide flange 172 may be moved tor any edge or side guide for the paper sheet 159. The carriage is provided with stop blocks on each side, the one on the left side which is secured on the inside of the side plate 76 ofthe carriage is shown in dotted lines in Fig. 1 and is indicated by 176 and is secured to the side plate by a bolt 177 and a rivet 178. This block 176 on the lett side of the machine is apertured at 179 to permit the entrance of pin 151 when the same is moved backward when the carriage moves to Contact with the stop bar 152. rlhus this aperture 179 allows the bloei( 176 to abut against the stop bar 152 on the iinal shock of stopping the carriage on movement to home position. On the right side of the machine on the inside ot the carriage side plate 7 7 there isy a similar stop block shown in dotted lines in Fig. 7 and indicated by 180 and this likewise is secured to the side plate 77 by a holt 181 and a rivet 182 and this block abuts against the stop bar 188 which corresponds on the right side to the bar 152 on the left side. is brought to registering position for the paper for the placement into the machine the blocks 176 and 180 abut against the stop bars 152 and 188. rlf'hese stop bars 152 and 188 are best observed in Fig. 18 and they extend through slots in the right and leftsideV frames 2 and 8 ci. the machine and arev Z-bar'shaped in general plan view and extend back under the bed' otthe machine and are secured by screws `184 and 185 to companion bars 186 and 187 7-'hich bars 186 and 187 are held together in sliding contact by screws 188 and 189 passing through slots in their opposite companions and are adjustable to and from the side frames to push'out or withdraw the stop bars 152 and 188 as desired and the means for moving the bars 186 and 187 and correspondingly the stop bars 152 and 188 are provided in the form oit connecting rods 190 and 191 hinged at 192 and 198 with small angle blocks secured respectively tothe bars 186 and 187 and the rods 190 and 191 are hinged at their other ends at 194 and 195 to a lever blocl; 196 hinged on a pin 197 i (see also' Fig. 5) whichpin 197 is secured by a bracket to the side frame member 2. The lever block 196 has a hand hold projection 199 .(see Figs. 1 and 1,8) extending outside of the lett vtrame-member 2 to permit the operator to move the stop bars 152 and 188 outward to engage and stop the carriage to registering position and allow the carriage to pass by the stop bars and roll down from the position of Fig'. 5 to the position of Fig. 8 the gear wheels riding into the rack teeth on the curved end of the side trame. falling oii trom the Jframe by reason or" two smallrollers 260, one on each side mounted on the bolt 177 and the bolt 181 and are best observed in Figs. 7 and 8. .Theserollers bear on the under side oi the railbars 15 and thus rFhus when the carriage The carriage is held from normally hold the carriage into the frame at all ti es. When the carriage is turned to the position of Fig. 8 the rollers 200 ride onto the edges 201 of the Vcurved end'plates 17 at the right endof the carriage.v Thepurpose of moving the carriage from the position of Fig. 7 to that of Fig. 8 is to provide clearance space between the end of the bed 8 and the baci; end of the carriage to allow the spindle of a fresh roll to be entered to the position at the front end of the machine. Y

ln order to allow a new spindle to be entered and an old one to be removed the margin bar 157 must be moved from the position shown in 5 to that shown in Fig. 8 and for convenience in moving this margin bar and in saving the time'of the operator, I connect it up to be moved by the hand hold projection" 199 of the lever block 196 and this connection is best shown in Figs. 2 and 13 and is brought 'about'by the rod 202 connected also at 'the point 195 to the block 196 and at the vother end'at 203 to a bell crank lever 20st hinged at1205 to a block 206 secured at 207 to the rightfr'ame 3 ofthe machine. The bell crank lever204 is connected at 208to a small rod 209 connecte'tl at 210 to a rack block 211 engaginga .pinion 212fn zed on the right arm 156 ofthe m'argin'bar 157.. Thus when theY lever vblock 196`is moved withdrawing the stop' bars 152 and 183 inwardly to clear the stop` blocks 176 and 180 simuitaneouslyT the marginbar 1571s rocled'to the position of Fig. 3 through the medium of rack 211 and pinion 212 connected as described.

Some operators may prefer toV catch hold directly of the margin bar 157 and rock it over from the position of Fig. v5 to that ofFig. 8 and since itis connected by the rack and pinion' as described,` it will likewise move and retract the stop bars 152 land 133 thus making7 as it were, as purely a matter of convenience the use ofthe hand hold projection 199 of the blo'cl; 196;

l In .the operation of the Ymachine the rocker shaft V1.15 is moved by the hand hold bulb 15ei raisingfand lowering the platen roll'112. The amountv of this movement is indicated in dotted lines in Fig. 5 andis limited by the stop pins 213 and 214L fixed to a segment 215 fixed to the projection 121 of the bracket 119 at the left side of the carriage.

As before stated the beltY 109 positively drives the rubber faced platen roll 112 due tothe pulley 101 being fixed to the shaft 85 driven positively by the gear wheels 100 engaging the rack teeth on the sideframe before described. However, in order. to ap ply the belt 109 in the first place andhold it taut in its operation the shaft with its lgears 100 ismade adjustable for belt tightening purposesthrough the means of the rocker shaft 93 yits arms 92 andthe portion ofthe blocks 88. Thus bv the adjustment of the rod 96 by the thumb nut 97 and itsV thumb nut 98 the belt 109may be loosened or tightened as desired.

In place of the belt'109 I may use any flexible connection such as a sprocket chain or any other suitable substitute for abelt, the point being to train the belt members closely together over the center: of the trunnionsf116 of the rocker shaft 115 and thus making a piv-A ot, as it were, about which hinged center the portions of the belt will rockin the raising and lowering of the platen roll 112 without bring; n

ing about a revolving action of the said roll.

It is necessary to prevent the platen` roll from revolving in laying down to first contact the paper to the gelatin sheet as in doing this if the platen roll revolvesit displaces the register against the shoulder 158 ofv th margin bar 157. Y

The arrangement of the mounting of the carriage on the frame whereby the carriage may be pulled downover the end ofthe side frame as shown by F ig. 8 is a handy arrangement for malring'clearance to entera fresh spindle and remove the used one and at the same time to give free access to the gelatin sheet 113 located upon the impression` bed f8.

what 1 claim is:

1. 1n' a machine of thev class described, a frame adapted tohave mounted therein spin'- dles carrying gelatin sheet rolls and an impression bed over which said sheet is trained for the exposure of the gelatin forcopying purposes7 rack teeth on each side of the said bed, and traclrways associated with the said rack Vteeth and said rac-k teeth and 'trackways merging into a downward curved portion at the front of the machine7 an impression car-' riage mounted on the saidtrackways and adapted to be moved outward and back over the said impression bed7 and downwardly over Vthe downward curved portion of'said frame, gears on the said car 1iage on the said impression bed and engaged by the said rack teeth on the said frame.

2. 1n av machine of the class described; a frame adapted to have mountedtherein spin-` dies carrying gelatin sheet rolls and an impression bed over which said sheet is trained for the exposure of the gelatin for copying purposes, rack teeth on each side ofthe said llt) bed` and trackways associated with the said rack teeth'and said rack teeth and trackways merging into a downwardl curved portion at the front of the machine', an impression carriage mounted on the said tracliways and adapted to be moved outward and back over the said impression bed and carrying gears engaged by the said. rack teeth on the said frame an adiustable stoo for limitinv the 7 L ZD frame provided with an impression bed, a gelatin sheet trained over the said bed, trachways on each side of the said bed adapted to carry an impression carriage, rack teeth disposed along each side of said hed, an impression carriage mounted on the said trackways and provided with a pair of spaced cioss shafts extending across the-said bed each having gears xed there-on adapted to engage the said rack teeth on each side of the said bed, a platen roller carried by the said carriage and adapted to impress paper onto the gelatin sheet on the said bed, and means for revolving the said platen roll independently of its Contact with the said bed and gelatin sheet thereon.

4. In a machine of the class described, a frame provided with an impressionhed, a gelatin sheet trained over the said bed, rack teeth on each side ofthe said bed adapted to carry an impression carriage, an impression carriage mounted on the said trackways and provided with a cross shaft extending across the said bed and having gears fixed thereon adapted to engage the said raclr teeth on each side of the said bed, and means for revolving the said platen roll independently of its contact with the said hed and gelatin sheet there on, said means for revolving the said platen roll driven hy the said gears which in turn are driven by the said rack teeth as the said carriage is moved along the said raclr.

5. In a machine of the class described, an impression bed adapted to support a gelatin sheet for copying purposes, racks located on each side of the said bed, an impression carriage mounted to be moved outward and back over the said bed and provided with a f 'ross shaft extending from side to side of the said bed and provided with gears fixed thereon and adapted to be engaged by the said racks, and thus guide the carriage squarely in its m-ovement outward and baclr over the said bed, a platen roller Carried by the said Carriage and adapted to impress paper on the said bed, a secondary shaft extending across and over the said bed and mounted in the said carriage and having gears fixed on the said secondary shaft and adapted to be engaged by the said racks, said secondary shaft mounted in the said carriage by adjustable means adapted to adjust the posi-- tion of the said secondary shaft nearer to or further away from the said platen roll, a pulley oii the said platen roll shaft and a pulley on the said secondary shaft and a belt trained over the two said pulleys and adapt ed to drive the said platen roll or holt` it stationary as relates to the revolution of the pulley on the said secondary shaft the latter impression bed adapted to support a gelatin sheet for copying purposes, racks located on each si'de of the said bed, an impression carriage mounted to be moved outward andhack over the said bed and provided with a cross shaft extending from side to side of the said bed and provided with gears fixed thereon and adapted to be engaged by the said racks.,

and thus guide the carriage squarely in its movement outward and bacl; over the said bed, a platen roller carried by the said carriageand adapted to impress paper on the said bed, a secondary shaft extending across and over the said hed and mounted in the.

said carriage and having gears fined on the said secondary shaft and adapted to be enf` gaged hy the said racks, said secondary shaft mounted in the said carriage by adjustable means adapted to adjust the position of the said secondary shaft nearer to or further away from the sain platen roll, a pulley on the said platen roll shaft and a pulley on the said secendary'shaft and a, belt trained over the two said pulleys and adapted to drive the said platen roll or hold it stationary as relates to the revolution of the pulley on the said secondary shaft the latter movement 1seing controlled by the said rack teeth and gears on the said secondary shaft, idle pulleys located between the pulley on the said platen roll shaft and the pulley on the said secondary shaft and said idle pulleys adapted to hold the said belt in its travel to cause it to pass closely over the hinge center of the rocher shaft upon which the said platen roll is mounted, a roeler shaft in which the said platen roll is mounted, and hinged into the said carriage and adapted to raise and lower the said platen roll to and from contact with the said gelatin sheet on the said impression bed.

7. :fn a machine of the class described, an impression bed, racks on each side of the sait impression bed, an impression carriage adapted to be mounted and moved outward and bach over said bed, a platen roll mounted in the said carriage and adapted to be raised and lowered in relation to the sai d' by the said gearing and a belt trained over the last named pulley and between the two said idle pulleys and over he said pulley on the said platen roll, means for adjusting the said pulley driven by the said gearing for tightening the said belt.

8. ln a machine of the class described,an impression bed` a rack mounted along the said bed, an impression carriage mounted toA be moved outward and bach overthe said bed, a gear mounted on a shaft. carried byr the said impression carriageand the shaft of the said gear adjustable in the said carriage in a line longitudinal of the said bed,

Ya plateniroll adapted vto impress paper on Y the said bed, said platen roll mounted in a rocker shafthiiiged inV the frame of the `said carriage adapted to be raised and lowered in relation to the said bed, a pulley on the shaft of the said platen roll Vand a pulley on the said shaft carrying tiie saidgear and a belt for driving the said platen roll from the said pulley driven by the said gear inconnection with the said rack.

9. In a machine of the class described, an.

impression hed, araclz mounted along the said bed, an impression carriage mounted to beV moved outward and back over the said bed, a gear mounted on a shaft carried by Y the said impression carriage `4and the shaft said pulley driven by the said gear in connection with the said rack, and idle pulleys for directing the trav'elof the said belt in going to and coming from the said platen roll pulley to cause it to pass closely by the center line Vof the hinge axis of the said rockery shaft. A i

10. In a machine of the class described, an impression bed, an impression carriage mounted to be moved outward and back over the said impression bed, a shaft supported in the said impression carriage frame and extending across over the said hed and said shaft mounted to be adjusted'bodily in the frame of the said impression carriage, a platen roll carried by the said carriage and adapted to impress paper on the Gelatin sheet on the said bed, a rocher shaft adapted to support and raise and lower the said platen roll and said rocker shaft hinged in the frame of the said carriage, said adjustable shaft carrying` a pulley and adapted to be driven by a gear and rack the latter being associated with the said bed and a pulley on the said platen roll and said rocker having its hinge axis mounted in a position between the said platen roll and the said adjustable shaft, means for revolving the said platen roll and for holding the same against revolution and Vconnected to the said adjustable shaft.

ing copies, said frame having, trackways on each side and adapted tol support an impres.- Y

sion carriage that may be moved outward and :back over the said'impression bed, said trackwayshaving curved portions extending downward at the front ofthe machine and said impression ca riage adapted tov be moved in a downward. position on the downward curved portions ofsaid trackways, a

margin bar hinged 'and supported in the said frame and adapted 13o-register paper in position on thesaid impression bed, stops for arresting the carriage in registering position in relation to the said margin bai', meansfor adjusting said stopsk and moving the said margin bar to permit the said oariage rto travel down on the said curved trackways and for clearance for the admissionV of the end of the Gelatin sheet.

12. lli a machine of the class described, an impression bed, an impression carriage mounted to travel over the said bed in laying paper thereon, adjustablestops for registering the position of the said carri-again rela'- tion to the said bed, a margin bar hinged to the teeth of the said racks having open spaces L at the bottom of the teeth and barslocated along the sides of the teeth for guiding lat.

erally the teeth of gear wheels which` gear wheels engage the saidrack, an impressiion carriage mounted on the said trackwaysfaiid provided with gear' wheels which engage they said racks, said racks and traokways extending parallel along in association withthe said impression bed and curved'downward at the front of the machine beyond the region of the impression bed.

14. In a machine of the class described, a frame, an impression bed mounted on the frame, racks extending along the side of the said impressionbed, an impressioncarriage mounted to travel outward and back over the s said impression bed and said impression carriage mounted on shafts extending across the said impression bed, onel of the said shafts adjustablein relation to the other longitudinally of the said bed, a platen `roll mounted in the said carriage and adaptedto be'raised and lowered in relation to the said bed, a pulley on the shaft of the said platen roll and a. pulley on one of the said shafts upon which the said impression carriage is moved and a belt-con nection from the last named pulleyt'o andv driving the pulley on the said platen roll shaft.

15. In a machine of the class described, an impression carriage mounted to travel out- Ward and back over an impression bed and said impression carriage having a cross shaft swingingly connected to the remainder of said carriage and extending the Width of the carriage o-ver an impression bed, and said shaft adjustable in a longitudinal direction as relates to the impression bed by means of a rocker shaft having arms connected to blocks which carry the bearing which support the said shaft in relation to its adjustment and the said blocks sliding in guideways in the said impression carriage.

16. In a machine of the class described, an

impression bed, an impression carriage mounted to be moved outward and back over the said bed, a platen roll carried by the said impression carriage and supported in arms of a rocker shaft, a rocker shaft hinged in the frame of the said impression carriage and mounted in open sided bearings in the said frame and sliding cover plates adapted to cover and uncover the open sides of the said rocker shaft bearings whereby the rocker shaft may be taken out bodily from the carrizge frame and carry With it the said platen ro l.

Si ed at Chicago, in the county of Cook and gsaltate of Illinois this 17th day of July 1928.

WILLIAM ERAS'IUS WILLIAMS. 

